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• adj. 難過的；悲哀的，令人悲痛的；凄慘的，陰郁的（形容顏色）

來自古英語 saed,得到滿足的，厭倦的，來自 Proto-Germanic*sadaz,使?jié)M意，使?jié)M足，來自 PIE*sa,使?jié)M意，使?jié)M足，詞源同 sate,satisfy.引申詞義厭煩的，傷心的，悲傷的。詞義演變比 較 nice,原義為笨的，傻的，后引申詞義好的。

sad

sad: [OE] Originally, to feel sad was to feel that one had had ‘enough’. For the word comes ultimately from the same Indo-European base that produced English satisfy and saturate. By the time it reached English (via a prehistoric Germanic *sathaz) ‘enough’ had already become extended to ‘weary’, and the modern sense ‘unhappy’ emerged in the 14th century.

The original notion of ‘sufficiency’ has now died out in the case of sad, but it survives in the case of sated [17], an alteration (probably under the influence of satiate) of the past participle of an earlier verb sade ‘satiate’, which was derived from sad.
=> sated, satiate, satisfy, saturate

sad (adj.)

Old English s?d "sated, full, having had one's fill (of food, drink, fighting, etc.), weary of," from Proto-Germanic *sathaz (cognates: Old Norse saer, Middle Dutch sat, Dutch zad, Old High German sat, German satt, Gothic sats "satiated, sated, full"), from PIE *seto- (cognates: Latin satis "enough, sufficient," Greek hadros "thick, bulky," Old Church Slavonic sytu, Lithuanian sotus "satiated," Old Irish saith "satiety," sathach "sated"), from root *sa- "to satisfy" (cognates: Sanskrit a-sinvan "insatiable").

Sense development passed through the meaning "heavy, ponderous" (i.e. "full" mentally or physically), and "weary, tired of" before emerging c. 1300 as "unhappy." An alternative course would be through the common Middle English sense of "steadfast, firmly established, fixed" (as in sad-ware "tough pewter vessels") and "serious" to "grave." In the main modern sense, it replaced Old English unrot, negative of rot "cheerful, glad."

Meaning "very bad" is from 1690s. Slang sense of "inferior, pathetic" is from 1899; sad sack is 1920s, popularized by World War II armed forces (specifically by cartoon character invented by Sgt. George Baker, 1942, and published in U.S. Armed Forces magazine "Yank"), probably a euphemistic shortening of common military slang phrase sad sack of shit.

1. This condition is called seasonal affective disorder, or SAD for short.

這種病情叫做季節(jié)性情感失調(diào)癥，或簡稱SAD。

來自柯林斯例句

2. Guy Powell, defending, told magistrates: "It's a sad and disturbing case."

蓋伊·鮑威爾在進行辯護時對地方法官說道：“這是一件非常不幸、令人不安的案子。”

來自柯林斯例句

3. I'm sad about my toys getting burned in the fire.

我的玩具在這場火中付之一炬，這令我很難過。

來自柯林斯例句

4. He died five or six years ago I'm sad to say.

很遺憾，他在五六年前去世了。

來自柯林斯例句

5. How can anyone look sad at an occasion like this?

在這樣的場合怎么會有人顯得憂傷呢？

來自柯林斯例句